200-301 Question 70
Single answerA network engineer is tasked with designing a new network backbone for a data center that spans 2 kilometers between buildings. The design must provide high bandwidth, low latency, and minimal signal loss. Which type of cabling should the engineer choose?
- A
Single-mode fiber
- B
Multimode fiber
- C
Cat 6 copper cable
- D
Coaxial cable
Show answer and explanation
Correct answer: A
Explanation
For a 2-kilometer data center backbone, single-mode fiber is the most appropriate choice due to its superior performance over long distances. Multimode fiber and copper cables have significant distance limitations, while coaxial cable is unsuitable for modern network backbones.
- A. Correct.
Single-mode fiber is designed for long-distance communication, typically up to tens of kilometers, and provides high bandwidth with minimal signal loss, making it the ideal choice for a 2-kilometer connection.
- B. Incorrect.
Multimode fiber is generally used for shorter distances (up to 500 meters) due to higher signal dispersion, making it less suitable for a 2-kilometer span.
- C. Incorrect.
Cat 6 copper cable is limited to a maximum distance of 100 meters for network applications, which is far less than the required 2 kilometers.
- D. Incorrect.
Coaxial cable is outdated for modern high-bandwidth networking and is not suitable for long-distance data links such as the 2-kilometer requirement.